Regenerative heater foe compressed air ist oil furnaces



Aug. 25, 1925. Y C. C. HANSEN REGRNRRATIVE HEATER RoR coMPRRssRD A'IRIN. OIL FuRNAcEs Filed Jan. 22. 1924 INVENToR M'e (flcm'en.

BY JM/@aa His ATTOR EY JPatented tug. Z5, i925.,

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CHARLES HANSEN, OF EASIGN, IPENNSYLVANIA, ASSGNOR TO INGERSOLIi-RANDCOMPANY, 0F JERSEY CITY, NEW JERSEY, A CORPORATION 0F NEW JERSEY.

REGENERATXVE HEATER FOB CGIHPRESSED AIR EN OIL FURNACES.

Application filed January 22, 1924.

To all whom t may concern.'

Be it known that I, CHARLES C. HANSEN, a citizen of the United States,and a resident of Easton, county of Northampton, and State ofPennsylvania, have invented a certain Regenerative Heater for CompressedAir in Cil Furnaces, of which the following is a specification,accompanied by drawings.

This invention relates to heaters, furnaces, forges and the lilre andmore particularly to oil burning furnaces in which a supply of air isemployed to atomize the oil at the nozzle.

lt has been found advantageous te preheat the air used for atomizingsuch oil and the object of this invention is accordingly to enable airused for this purpose to be preheated to a high degree by waste heatfrom the forge.

Cther objects of the invention will become apparent from the followingdescription taken in conjunction with the drawing in which there isillust-rated one form which r the invention may assume in practice.

Figure 1 is a front perspective view of a forge constructed inaccordance with the practice of the invention, and

Figure 2 is a sectional view along the line 2-2 ofv Figure l, looking inthe'direction of the arrows.

The forge illustrated is of the type ordinarily used forI heating rockdrill steels preparatory to forging, and comprises a base formed by twouprights A braced by diagonals B and a cross bar C adapted to support acast iron box D lined inside with fire brick E into which a burner F isadapted to inject the combustible mixture of air and atomized oil. Thereis provided an aperture Gr in the boX D in front of the burner F toadmit the burning mixture of oil and air which is deflected sidewise bythe curved brick lining E. rlhe products of combustion are permitted toescape through the suitable apertures H in the front and rear of thebox. If desired, articles such as for instance a drill steel J areinserted for heating through one of the apertures H at the front orrear. A front rest K is provided upon which to lay the steel J.

If it is desired to use only one side of the forge, the rear aperture Hmay be closed to prevent excessive loss of heat. A guard L is providedat the front of the forge and Serial No. 687,837.

at the back if so desired, to prevent to some extent the heated gas frombeing directed at the operator. Suitable rods C passing through theupwardly projecting side walls l? of the box D may be used to supportthe guards L.

A suitable combustible oil is supplied to the burner F through a supplypipe Q. Compressed air for atomizing the oil at the burner is suppliedthrough the pipe R. The supply of fuel and atomizing air is regulated bya valve controlled nozzle S at the burner while the supply of fuel andair may be separately controlled by suitable valves T and U in the pipesQ and R respectively.

The compressed air fed to the nozzle S is supplied from a main supplypipe V extending across thel upper portion of the forge between thefront face of the box D and guard L. From thence the air is conductedthrough suitable pipes VV connect-- ing with the pipe R and leading tothe nozzle S. If desired, an additional valve X may be placed in thesupply pipe V to shut olf the air furnished to the nozzle S. The pipe Vmay malte as many loops between the guard L and the front of the box Das are necessary to preheat the air for obtaining the most economicalresults. A single loop is usually suihcient for this purpose as shown inthe drawing. In order to direct the heated gas issuing from the apertureH more effectively against the pipe V, a blast of air is directed froma, pipe Y supported by the rest K and having a plurality of smallapertures Z along its length directed at the pipe V. The blast pipe Y isconnected through a valve b to the compressed air supply pipe W at apipe connection c. An air injector Z is employed to increase the supplyof air to the blast pipe Y at somewhat decreased pressure. The air blastissuing from the apertures Z also directs the current of heated gas inthe aperture H implement opening and close to the furnace wall andconnected to the fuel burner, a branch pipe leading` from said fuelburner extending upwardly and then across the front of the furnacedirectly below the implement opening, said cross connection havingperforations across its top for directing the air under pressure acrossthe front of the implement opening towards the air pipe above theopeningfor directing` the heated air from the pipe and also the productsof combustion from the furnace around the @mgm mi.;

CHARLES C. HANSEN.

